If you are worried about your caffeine intake and counting your cups of tea and coffee, then you don't need to. A new study says that caffeine is harmless.

It's blamed for anxiety and sleeplessness, but now researchers are saying that caffeine boosts both mental and physical performance and find it safe for pregnant women and young childrens.

The research appears in the Journal Complete Nutrition, according to it sticking to the recommended daily amount of 400mg-the equivalent four cups of coffee or eight cups of tea-has no lasting damage on the body.

The people who cut out tea and coffee out of fear, they may miss out potential health benefits of the compounds they contain. At least 15 different trials are documented on the benefits which caffeine has on the brain, including improving reaction times, accuracy in test and alertness.